Emulates a three row diatonic or continental chromatic accordion. There is a choice of midi instruments and keys, including C System and B System. * Keys: F/Bb/Eb, G/C/F, A/D/G, C#/D/G, B/C/C#, C System, B System * Instruments: Standard midi set, defaults to accordion * Choice of one standard 31 button Hohner layout and two 25 button layouts * Choice of fascia images Uses Sonivox midi synthesizer for midi audio output.